<?php
/* For licensing terms, see /license.txt */
/**
 * @package chamilo.calendar
 */
/**
 * INIT SECTION
 */

// name of the language file that needs to be included
$language_file = array('agenda','group');

// use anonymous mode when accessing this course tool
$use_anonymous = true;

require_once '../inc/global.inc.php';

api_protect_course_script(true);

//session
if(isset($_GET['id_session'])) {
	$_SESSION['id_session'] = intval($_GET['id_session']);
}

$action = isset($_GET['action']) ? $_GET['action'] : null;
$origin = isset($_GET['origin']) ? $_GET['origin'] : null; 

$this_section=SECTION_COURSES;

require_once api_get_path(LIBRARY_PATH).'groupmanager.lib.php';

/* 	Resource linker */
$_SESSION['source_type'] = 'Agenda';
require_once '../resourcelinker/resourcelinker.inc.php';
require_once api_get_path(LIBRARY_PATH).'fileUpload.lib.php';

if (!empty($addresources)) {
    // When the "Add Resource" button is clicked we store all the form data into a session
    $form_elements= array ('day'=>Security::remove_XSS($_POST['fday']), 'month'=>Security::remove_XSS($_POST['fmonth']), 'year'=>Security::remove_XSS($_POST['fyear']), 'hour'=>Security::remove_XSS($_POST['fhour']), 'minutes'=>Security::remove_XSS($_POST['fminute']),
    						'end_day'=>Security::remove_XSS($_POST['end_fday']), 'end_month'=>Security::remove_XSS($_POST['end_fmonth']), 'end_year'=>Security::remove_XSS($_POST['end_fyear']), 'end_hours'=>Security::remove_XSS($_POST['end_fhour']), 'end_minutes'=>Security::remove_XSS($_POST['end_fminute']),
    						'title'=>Security::remove_XSS(stripslashes($_POST['title'])), 'content'=>Security::remove_XSS(stripslashes($_POST['content'])), 'id'=>Security::remove_XSS($_POST['id']), 'action'=>Security::remove_XSS($_POST['action']), 'to'=>Security::remove_XSS($_POST['selectedform']));
    $_SESSION['formelements']=$form_elements;
    // this is to correctly handle edits
    if($id){$action="edit";}
    //print_r($form_elements);
    header('Location: '.api_get_path(WEB_CODE_PATH)."resourcelinker/resourcelinker.php?source_id=1&action=$action&id=$id&originalresource=no");
    exit;
}

if (!empty($_GET['view'])) {
	$_SESSION['view'] = Security::remove_XSS($_GET['view']);
}

// Functions for the agenda tool
require_once 'agenda.inc.php';
/*
  			TREATING THE PARAMETERS
			1. viewing month only or everything
			2. sort ascending or descending
			3. showing or hiding the send-to-specific-groups-or-users form
			4. filter user or group
*/


// 3. showing or hiding the send-to-specific-groups-or-users form
$setting_allow_individual_calendar=true;
if (empty($_POST['To']) and empty($_SESSION['allow_individual_calendar'])) {
	$_SESSION['allow_individual_calendar']="hide";
}
$allow_individual_calendar_status=$_SESSION['allow_individual_calendar'];
if (!empty($_POST['To']) and ($allow_individual_calendar_status=="hide")) {
	$_SESSION['allow_individual_calendar']="show";
}
if (!empty($_GET['sort']) and ($allow_individual_calendar_status=="show")) {
	$_SESSION['allow_individual_calendar']="hide";
}

// 4. filter user or group
if (!empty($_GET['user']) or !empty($_GET['group'])) {
	$_SESSION['user']=(int)$_GET['user'];
	
	$_SESSION['group']=(int)$_GET['group'];
}
if ((!empty($_GET['user']) and $_GET['user']=="none") or (!empty($_GET['group']) and $_GET['group']=="none")) {
	api_session_unregister("user");
	api_session_unregister("group");
}
if (!$is_courseAdmin){
	if (!empty($_GET['toolgroup'])){
		//$_SESSION['toolgroup']=$_GET['toolgroup'];
		$toolgroup=Security::remove_XSS($_GET['toolgroup']);
		api_session_register('toolgroup');
	}
}
//It comes from the group tools. If it's define it overwrites $_SESSION['group']
/*
if (!empty($_GET['isStudentView']) and $_GET['isStudentView']=="false") {
	api_session_unregister("user");
	api_session_unregister("group");
}*/

$htmlHeadXtra[] = api_get_jquery_ui_js();
$htmlHeadXtra[] = to_javascript();
$htmlHeadXtra[] = user_group_filter_javascript();

// this loads the javascript that is needed for the date popup selection
$htmlHeadXtra[] = "<script src=\"tbl_change.js\" type=\"text/javascript\" language=\"javascript\"></script>";

// setting the name of the tool
$nameTools = get_lang('Agenda'); // language variable in trad4all.inc.php

// showing the header if we are not in the learning path, if we are in
// the learning path, we do not include the banner so we have to explicitly
// include the stylesheet, which is normally done in the header
if (isset($_GET['toolgroup']) && !empty($_GET['toolgroup'])){
	$_clean['toolgroup']= intval($_GET['toolgroup']);
	$group_properties  = GroupManager :: get_group_properties($_clean['toolgroup']);
	$interbreadcrumb[] = array ("url" => "../group/group.php", "name" => get_lang('Groups'));
	$interbreadcrumb[] = array ("url"=>"../group/group_space.php?gidReq=".Security::remove_XSS($_GET['toolgroup']), "name"=> get_lang('GroupSpace').' '.$group_properties['name']);
	Display::display_header($nameTools,'Agenda');

} elseif (empty($origin) or $origin != 'learnpath') {	
    Display::display_header($nameTools,'Agenda');
} else {
	echo "<link rel=\"stylesheet\" type=\"text/css\" href=\"".api_get_path(WEB_CODE_PATH)."css/default.css\"/>";
}

/* 
  			TRACKING
 */
event_access_tool(TOOL_CALENDAR_EVENT);

/*   			SETTING SOME VARIABLES
*/
// Variable definitions
// Defining the shorts for the days. We use camelcase because these are arrays of language variables
$DaysShort = api_get_week_days_short();
// Defining the days of the week to allow translation of the days. We use camelcase because these are arrays of language variables
$DaysLong = api_get_week_days_long();
// Defining the months of the year to allow translation of the months. We use camelcase because these are arrays of language variables
$MonthsLong = api_get_months_long();

// Database table definitions
$TABLEAGENDA 			= Database::get_course_table(TABLE_AGENDA);
$TABLE_ITEM_PROPERTY 	= Database::get_course_table(TABLE_ITEM_PROPERTY);
$tbl_user       		= Database::get_main_table(TABLE_MAIN_USER);
$tbl_courseUser 		= Database::get_main_table(TABLE_MAIN_COURSE_USER);
$tbl_group      		= Database::get_course_table(TABLE_GROUP);
$tbl_groupUser  		= Database::get_course_table(TABLE_GROUP_USER);
$tbl_session_course_user= Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);

/*   			ACCESS RIGHTS*/
// permission stuff - also used by loading from global in agenda.inc.php
$is_allowed_to_edit = api_is_allowed_to_edit(false,true) OR (api_get_course_setting('allow_user_edit_agenda') && !api_is_anonymous());

// Tool introduction
Display::display_introduction_section(TOOL_CALENDAR_EVENT);

/*		MAIN SECTION	*/

//setting the default year and month
$select_year = '';
$select_month = '';
$select_day = '';

if(!empty($_GET['year'])) {
	$select_year = (int)$_GET['year'];
}
if(!empty($_GET['month'])) {
	$select_month = (int)$_GET['month'];
}
if(!empty($_GET['day'])) {
    $select_day = (int)$_GET['day'];
}

$today = getdate();

if (empty($select_year)) {	
	$select_year = $today['year'];	
}
if (empty($select_month)) { 
    $select_month = $today['mon'];
}

echo '<div class="actions">';
if (api_is_allowed_to_edit(false,true) OR (api_get_course_setting('allow_user_edit_agenda') && !api_is_anonymous()) && api_is_allowed_to_session_edit(false,true)) {
	display_courseadmin_links();
}
display_student_links();
echo '</div>';


// Getting agenda items

$agenda_items = get_calendar_items($select_month, $select_year);

if ($_SESSION['view'] != 'month') {
	echo '<table width="100%" border="0" cellspacing="0" cellpadding="0"><tr>';

	// THE LEFT PART
	if (empty($origin) or $origin !='learnpath') {
		echo '<td width="220" height="19" valign="top">';
		// the small calendar
		if (api_get_setting('display_mini_month_calendar') == 'true') {
			display_minimonthcalendar($agenda_items, $select_month, $select_year);
		}
		echo '<br />';
		if (api_get_setting('display_upcoming_events') == 'true') {
			display_upcoming_events();
		}
		echo '</td>';
		echo '<td width="20" background="../img/verticalruler.gif">&nbsp;</td>';
	}

	// THE RIGHT PART
	echo '<td valign="top">';
	echo '<div class="sort" style="float:left">';
	echo '</div>';
}

$event_id = isset($_GET['id']) ? $_GET['id'] : null;
$course_info = api_get_course_info(); 

if (api_is_allowed_to_edit(false,true) OR (api_get_course_setting('allow_user_edit_agenda') && !api_is_anonymous() && api_is_allowed_to_session_edit(false,true))) {
	switch($action) {
		case 'add':
			if (isset($_POST['submit_event']) && $_POST['submit_event']) {				
				$event_start 		= (int) $_POST['fyear'].'-'.(int) $_POST['fmonth'].'-'.(int) $_POST['fday'].' '.(int) $_POST['fhour'].':'.(int) $_POST['fminute'].':00';
				$event_stop   		= (int) $_POST['end_fyear'].'-'.(int) $_POST['end_fmonth'].'-'.(int) $_POST['end_fday'].' '.(int) $_POST['end_fhour'].':'.(int) $_POST['end_fminute'].':00';
				$safe_title 		= Security::remove_XSS($_POST['title']);
				$safe_file_comment 	= Security::remove_XSS($_POST['file_comment']);
		
				if ($_POST['empty_end_date'] == 'on' ) {
					$event_stop = '0000-00-00 00:00:00';
				}
				$id = agenda_add_item($course_info,$safe_title,$_POST['content'],$event_start,$event_stop,$_POST['selectedform'],false,$safe_file_comment);
				if (!empty($_POST['repeat'])) {
					$end_y = intval($_POST['repeat_end_year']);
					$end_m = intval($_POST['repeat_end_month']);
					$end_d = intval($_POST['repeat_end_day']);
					$end   = mktime(23, 59, 59, $end_m, $end_d, $end_y);
					$res   = agenda_add_repeat_item($course_info,$id, $_POST['repeat_type'], $end,$_POST['selectedform'], $safe_file_comment);
				}
				$action = 'view';
			} else {
				show_add_form();
			}
			break;			
		case "announce":
			//copying the agenda item into an announcement
			if (!(api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, $event_id))) {
				// a coach can only delete an element belonging to his session
				$ann_id = store_agenda_item_as_announcement($event_id);
				$tool_group_link = (isset($_SESSION['toolgroup'])?'&toolgroup='.$_SESSION['toolgroup']:'');
				Display::display_normal_message(get_lang('CopiedAsAnnouncement').'&nbsp;<a href="../announcements/announcements.php?id='.$ann_id.$tool_group_link.'">'.get_lang('NewAnnouncement').'</a>', false);
			}			
			break;
		case 'importical':
			if (isset($_POST['ical_submit'])) {                
                $ical_name = $_FILES['ical_import']['name'];
                $ical_type = $_FILES['ical_import']['type'];
                
                $ext = substr($ical_name,(strrpos($ical_name,".")+1));

                //$ical_type === 'text/calendar' 
                if ($ext === 'ics' || $ext === 'ical' || $ext === 'icalendar'  || $ext === 'ifb') {
                	agenda_import_ical($course_info, $_FILES['ical_import']);
                	$is_ical = true;
                } else {
                	$is_ical = false;
                }
                
                if (!$is_ical) {
                	Display::display_error_message(get_lang('IsNotiCalFormatFile'));
                	display_ical_import_form();
                	break;
                } else {
                	Display::display_confirmation_message(get_lang('AddSuccess'));
                }                
            } else {
            	display_ical_import_form();
            }
            break;		
		case 'edit':
			if(!(api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, intval($_REQUEST['id'])))) {				
				// a coach can only delete an element belonging to his session
				if ($_POST['submit_event']) {
					store_edited_agenda_item($_REQUEST['id_attach'], $_REQUEST['file_comment']);
					$action = 'view';
				} else {				    
					show_add_form($event_id);
				}
			}
			break;
		case "delete":			
			if( ! (api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, $event_id ) ) ) {
				// a coach can only delete an element belonging to his session
				delete_agenda_item($event_id);
				$action = 'view';
			}			
			break;
		case "showhide":			
			if (!(api_is_course_coach() && !api_is_element_in_the_session(TOOL_AGENDA, $event_id))) {
			     // a coach can only delete an element belonging to his session			   
				showhide_agenda_item($event_id);
				$action = 'view';
			}
			if (!empty($_GET['agenda_id'])) {
				display_one_agenda_item($_GET['agenda_id']);
			}					
			break;		
		case "delete_attach": 	//delete attachment file
			$id_attach = $_GET['id_attach'];
			if (!empty($id_attach)) {
				delete_attachment_file($id_attach);
				$action = 'view';
			}			
			break;
	}
}

$agenda_items = get_calendar_items($select_month, $select_year);

// this is for students and whenever the courseaministrator has not chosen any action. It is in fact the default behaviour

if ($action == "view" || empty($action)) {    
	if ($origin != 'learnpath') {	    
		if ($_SESSION['view'] == 'month') {
		    display_monthcalendar($select_month, $select_year, $agenda_items);            
		} else {
		  if (!empty($_GET['agenda_id'])) {
                display_one_agenda_item($_GET['agenda_id']);
            } else {
                $month_name = $MonthsLong[$select_month -1];                
                echo Display::tag('h2', $select_day.' '.$month_name.' '.$select_year);                
                display_agenda_items($agenda_items, $select_day);
            }
		}
	} 	
}	

echo '</td></tr></table>';

/*		FOOTER */
// The footer is displayed only if we are not in the learnpath
if ($origin != 'learnpath') {
	Display::display_footer();
}